reasonably vs fairly

reasonably and fairly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
reasonably	No	No	No	Yes
fairly	No	No	No	Yes

As adverbs, reasonably and fairly are synonyms defined as:

Other synonyms of reasonably include jolly, middling, moderately, passably, pretty, somewhat.

reasonably (adverb)	fairly (adverb)
to certain extent or degree	without favoring one party, in a fair evenhanded manner
with good sense or in a reasonable or intelligent manner	to certain extent or degree
	in conformity with the rules or laws and without fraud or cheating